>>> On 03.08.15 at 13:29, <[email protected]> wrote: > From: David Vrabel <[email protected]> > > Instead of cpu_relax() while spinning and observing the ticket head, > introduce arch_lock_relax() which executes a WFE instruction. After > the ticket head is changed call arch_lock_signal() to execute an SEV > instruction (with the required DSB first) to wake any spinners. > > This should improve power consumption when locks are contented and > spinning.
So why not use MONITOR/MWAIT on x86 for the same purpose? Jan _______________________________________________ Xen-devel mailing list [email protected] http://lists.xen.org/xen-devel
